Original Part
SRAM - Asynchronous Memory IC 4Mbit Parallel 12 ns 48-CABGA (9x9)
Alternative Part
SRAM - Asynchronous Memory IC 4Mbit Parallel 55 ns 48-TFBGA (6x8)
SRAM - Asynchronous Memory IC 4Mbit Parallel 55 ns 48-TFBGA (6x8)
1. IS62WV25616BLL-55BLI Substitution Conclusion
From the perspective of core functionality and electrical compatibility, this part can serve as a drop-in replacement for the original component. However, a significant reduction in speed grade must be accepted, and physical package compatibility must be verified. The key differences are as follows: First, the access/cycle time is 55ns, which is considerably slower than the original part's 12ns. If the system has insufficient timing margin or stringent memory speed requirements, direct substitution may lead to system instability or degraded performance. Second, the operating voltage range is 2.5V to 3.6V, wider than the original's 3.0V to 3.6V. This offers better compatibility in low-voltage systems, though operation in a standard 3.3V system is fundamentally the same. Third, while both use a 48-ball BGA, the original part is a 9x9mm CABGA, whereas this part is a 6x8mm TFBGA. The PCB pad layout may be incompatible. A pin-compatible replacement is only possible if the PCB is redesigned or the ball map is confirmed to be identical.
2. IS62WV25616BLL-55BLI-TR Substitution Conclusion
The substitution conclusion for this part is identical to that for the IS62WV25616BLL-55BLI described above. The "-TR" suffix typically denotes only the Tape and Reel packaging format for automated SMT assembly and is unrelated to the chip's electrical characteristics, performance parameters, or package dimensions. When evaluating substitution feasibility, the two critical points remain the same: the speed downgrade (55ns vs. 12ns) and the physical package size difference (6x8mm TFBGA vs. 9x9mm CABGA). These require the same level of attention and handling.
Analysis ID: C765-102F000
Based on part parameters and for reference only. Not to be used for procurement or production.
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